[linux-2.6-block.git] / drivers / power / pda_power.c

/*
 * Common power driver for PDAs and phones with one or two external
 * power supplies (AC/USB) connected to main and backup batteries,
 * and optional builtin charger.
 *
 * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/power_supply.h>
#include <linux/pda_power.h>
#include <linux/regulator/consumer.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
#include <linux/usb/otg.h>

static inline unsigned int get_irq_flags(struct resource *res)
{
	return IRQF_SHARED | (res->flags & IRQF_TRIGGER_MASK);
}

static struct device *dev;
static struct pda_power_pdata *pdata;
static struct resource *ac_irq, *usb_irq;
static struct timer_list charger_timer;
static struct timer_list supply_timer;
static struct timer_list polling_timer;
static int polling;

#if IS_ENABLED(CONFIG_USB_PHY)
static struct usb_phy *transceiver;
static struct notifier_block otg_nb;
#endif

static struct regulator *ac_draw;

enum {
	PDA_PSY_OFFLINE = 0,
	PDA_PSY_ONLINE = 1,
	PDA_PSY_TO_CHANGE,
};
static int new_ac_status = -1;
static int new_usb_status = -1;
static int ac_status = -1;
static int usb_status = -1;

static int pda_power_get_property(struct power_supply *psy,
				  enum power_supply_property psp,
				  union power_supply_propval *val)
{
	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		if (psy->type == POWER_SUPPLY_TYPE_MAINS)
			val->intval = pdata->is_ac_online ?
				      pdata->is_ac_online() : 0;
		else
			val->intval = pdata->is_usb_online ?
				      pdata->is_usb_online() : 0;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static enum power_supply_property pda_power_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
};

static char *pda_power_supplied_to[] = {
	"main-battery",
	"backup-battery",
};

static struct power_supply pda_psy_ac = {
	.name = "ac",
	.type = POWER_SUPPLY_TYPE_MAINS,
	.supplied_to = pda_power_supplied_to,
	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
	.properties = pda_power_props,
	.num_properties = ARRAY_SIZE(pda_power_props),
	.get_property = pda_power_get_property,
};

static struct power_supply pda_psy_usb = {
	.name = "usb",
	.type = POWER_SUPPLY_TYPE_USB,
	.supplied_to = pda_power_supplied_to,
	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
	.properties = pda_power_props,
	.num_properties = ARRAY_SIZE(pda_power_props),
	.get_property = pda_power_get_property,
};

static void update_status(void)
{
	if (pdata->is_ac_online)
		new_ac_status = !!pdata->is_ac_online();

	if (pdata->is_usb_online)
		new_usb_status = !!pdata->is_usb_online();
}

static void update_charger(void)
{
	static int regulator_enabled;
	int max_uA = pdata->ac_max_uA;

	if (pdata->set_charge) {
		if (new_ac_status > 0) {
			dev_dbg(dev, "charger on (AC)\n");
			pdata->set_charge(PDA_POWER_CHARGE_AC);
		} else if (new_usb_status > 0) {
			dev_dbg(dev, "charger on (USB)\n");
			pdata->set_charge(PDA_POWER_CHARGE_USB);
		} else {
			dev_dbg(dev, "charger off\n");
			pdata->set_charge(0);
		}
	} else if (ac_draw) {
		if (new_ac_status > 0) {
			regulator_set_current_limit(ac_draw, max_uA, max_uA);
			if (!regulator_enabled) {
				dev_dbg(dev, "charger on (AC)\n");
				WARN_ON(regulator_enable(ac_draw));
				regulator_enabled = 1;
			}
		} else {
			if (regulator_enabled) {
				dev_dbg(dev, "charger off\n");
				WARN_ON(regulator_disable(ac_draw));
				regulator_enabled = 0;
			}
		}
	}
}

static void supply_timer_func(unsigned long unused)
{
	if (ac_status == PDA_PSY_TO_CHANGE) {
		ac_status = new_ac_status;
		power_supply_changed(&pda_psy_ac);
	}

	if (usb_status == PDA_PSY_TO_CHANGE) {
		usb_status = new_usb_status;
		power_supply_changed(&pda_psy_usb);
	}
}

static void psy_changed(void)
{
	update_charger();

	/*
	 * Okay, charger set. Now wait a bit before notifying supplicants,
	 * charge power should stabilize.
	 */
	mod_timer(&supply_timer,
		  jiffies + msecs_to_jiffies(pdata->wait_for_charger));
}

static void charger_timer_func(unsigned long unused)
{
	update_status();
	psy_changed();
}

static irqreturn_t power_changed_isr(int irq, void *power_supply)
{
	if (power_supply == &pda_psy_ac)
		ac_status = PDA_PSY_TO_CHANGE;
	else if (power_supply == &pda_psy_usb)
		usb_status = PDA_PSY_TO_CHANGE;
	else
		return IRQ_NONE;

	/*
	 * Wait a bit before reading ac/usb line status and setting charger,
	 * because ac/usb status readings may lag from irq.
	 */
	mod_timer(&charger_timer,
		  jiffies + msecs_to_jiffies(pdata->wait_for_status));

	return IRQ_HANDLED;
}

static void polling_timer_func(unsigned long unused)
{
	int changed = 0;

	dev_dbg(dev, "polling...\n");

	update_status();

	if (!ac_irq && new_ac_status != ac_status) {
		ac_status = PDA_PSY_TO_CHANGE;
		changed = 1;
	}

	if (!usb_irq && new_usb_status != usb_status) {
		usb_status = PDA_PSY_TO_CHANGE;
		changed = 1;
	}

	if (changed)
		psy_changed();

	mod_timer(&polling_timer,
		  jiffies + msecs_to_jiffies(pdata->polling_interval));
}

#if IS_ENABLED(CONFIG_USB_PHY)
static int otg_is_usb_online(void)
{
	return (transceiver->last_event == USB_EVENT_VBUS ||
		transceiver->last_event == USB_EVENT_ENUMERATED);
}

static int otg_is_ac_online(void)
{
	return (transceiver->last_event == USB_EVENT_CHARGER);
}

static int otg_handle_notification(struct notifier_block *nb,
		unsigned long event, void *unused)
{
	switch (event) {
	case USB_EVENT_CHARGER:
		ac_status = PDA_PSY_TO_CHANGE;
		break;
	case USB_EVENT_VBUS:
	case USB_EVENT_ENUMERATED:
		usb_status = PDA_PSY_TO_CHANGE;
		break;
	case USB_EVENT_NONE:
		ac_status = PDA_PSY_TO_CHANGE;
		usb_status = PDA_PSY_TO_CHANGE;
		break;
	default:
		return NOTIFY_OK;
	}

	/*
	 * Wait a bit before reading ac/usb line status and setting charger,
	 * because ac/usb status readings may lag from irq.
	 */
	mod_timer(&charger_timer,
		  jiffies + msecs_to_jiffies(pdata->wait_for_status));

	return NOTIFY_OK;
}
#endif

static int pda_power_probe(struct platform_device *pdev)
{
	int ret = 0;

	dev = &pdev->dev;

	if (pdev->id != -1) {
		dev_err(dev, "it's meaningless to register several "
			"pda_powers; use id = -1\n");
		ret = -EINVAL;
		goto wrongid;
	}

	pdata = pdev->dev.platform_data;

	if (pdata->init) {
		ret = pdata->init(dev);
		if (ret < 0)
			goto init_failed;
	}

	ac_draw = regulator_get(dev, "ac_draw");
	if (IS_ERR(ac_draw)) {
		dev_dbg(dev, "couldn't get ac_draw regulator\n");
		ac_draw = NULL;
	}

	update_status();
	update_charger();

	if (!pdata->wait_for_status)
		pdata->wait_for_status = 500;

	if (!pdata->wait_for_charger)
		pdata->wait_for_charger = 500;

	if (!pdata->polling_interval)
		pdata->polling_interval = 2000;

	if (!pdata->ac_max_uA)
		pdata->ac_max_uA = 500000;

	setup_timer(&charger_timer, charger_timer_func, 0);
	setup_timer(&supply_timer, supply_timer_func, 0);

	ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");
	usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");

	if (pdata->supplied_to) {
		pda_psy_ac.supplied_to = pdata->supplied_to;
		pda_psy_ac.num_supplicants = pdata->num_supplicants;
		pda_psy_usb.supplied_to = pdata->supplied_to;
		pda_psy_usb.num_supplicants = pdata->num_supplicants;
	}

#if IS_ENABLED(CONFIG_USB_PHY)
	transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
	if (!IS_ERR_OR_NULL(transceiver)) {
		if (!pdata->is_usb_online)
			pdata->is_usb_online = otg_is_usb_online;
		if (!pdata->is_ac_online)
			pdata->is_ac_online = otg_is_ac_online;
	}
#endif

	if (pdata->is_ac_online) {
		ret = power_supply_register(&pdev->dev, &pda_psy_ac);
		if (ret) {
			dev_err(dev, "failed to register %s power supply\n",
				pda_psy_ac.name);
			goto ac_supply_failed;
		}

		if (ac_irq) {
			ret = request_irq(ac_irq->start, power_changed_isr,
					  get_irq_flags(ac_irq), ac_irq->name,
					  &pda_psy_ac);
			if (ret) {
				dev_err(dev, "request ac irq failed\n");
				goto ac_irq_failed;
			}
		} else {
			polling = 1;
		}
	}

	if (pdata->is_usb_online) {
		ret = power_supply_register(&pdev->dev, &pda_psy_usb);
		if (ret) {
			dev_err(dev, "failed to register %s power supply\n",
				pda_psy_usb.name);
			goto usb_supply_failed;
		}

		if (usb_irq) {
			ret = request_irq(usb_irq->start, power_changed_isr,
					  get_irq_flags(usb_irq),
					  usb_irq->name, &pda_psy_usb);
			if (ret) {
				dev_err(dev, "request usb irq failed\n");
				goto usb_irq_failed;
			}
		} else {
			polling = 1;
		}
	}

#if IS_ENABLED(CONFIG_USB_PHY)
	if (!IS_ERR_OR_NULL(transceiver) && pdata->use_otg_notifier) {
		otg_nb.notifier_call = otg_handle_notification;
		ret = usb_register_notifier(transceiver, &otg_nb);
		if (ret) {
			dev_err(dev, "failure to register otg notifier\n");
			goto otg_reg_notifier_failed;
		}
		polling = 0;
	}
#endif

	if (polling) {
		dev_dbg(dev, "will poll for status\n");
		setup_timer(&polling_timer, polling_timer_func, 0);
		mod_timer(&polling_timer,
			  jiffies + msecs_to_jiffies(pdata->polling_interval));
	}

	if (ac_irq || usb_irq)
		device_init_wakeup(&pdev->dev, 1);

	return 0;

#if IS_ENABLED(CONFIG_USB_PHY)
otg_reg_notifier_failed:
	if (pdata->is_usb_online && usb_irq)
		free_irq(usb_irq->start, &pda_psy_usb);
#endif
usb_irq_failed:
	if (pdata->is_usb_online)
		power_supply_unregister(&pda_psy_usb);
usb_supply_failed:
	if (pdata->is_ac_online && ac_irq)
		free_irq(ac_irq->start, &pda_psy_ac);
#if IS_ENABLED(CONFIG_USB_PHY)
	if (!IS_ERR_OR_NULL(transceiver))
		usb_put_phy(transceiver);
#endif
ac_irq_failed:
	if (pdata->is_ac_online)
		power_supply_unregister(&pda_psy_ac);
ac_supply_failed:
	if (ac_draw) {
		regulator_put(ac_draw);
		ac_draw = NULL;
	}
	if (pdata->exit)
		pdata->exit(dev);
init_failed:
wrongid:
	return ret;
}

static int pda_power_remove(struct platform_device *pdev)
{
	if (pdata->is_usb_online && usb_irq)
		free_irq(usb_irq->start, &pda_psy_usb);
	if (pdata->is_ac_online && ac_irq)
		free_irq(ac_irq->start, &pda_psy_ac);

	if (polling)
		del_timer_sync(&polling_timer);
	del_timer_sync(&charger_timer);
	del_timer_sync(&supply_timer);

	if (pdata->is_usb_online)
		power_supply_unregister(&pda_psy_usb);
	if (pdata->is_ac_online)
		power_supply_unregister(&pda_psy_ac);
#if IS_ENABLED(CONFIG_USB_PHY)
	if (!IS_ERR_OR_NULL(transceiver))
		usb_put_phy(transceiver);
#endif
	if (ac_draw) {
		regulator_put(ac_draw);
		ac_draw = NULL;
	}
	if (pdata->exit)
		pdata->exit(dev);

	return 0;
}

#ifdef CONFIG_PM
static int ac_wakeup_enabled;
static int usb_wakeup_enabled;

static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
{
	if (pdata->suspend) {
		int ret = pdata->suspend(state);

		if (ret)
			return ret;
	}

	if (device_may_wakeup(&pdev->dev)) {
		if (ac_irq)
			ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
		if (usb_irq)
			usb_wakeup_enabled = !enable_irq_wake(usb_irq->start);
	}

	return 0;
}

static int pda_power_resume(struct platform_device *pdev)
{
	if (device_may_wakeup(&pdev->dev)) {
		if (usb_irq && usb_wakeup_enabled)
			disable_irq_wake(usb_irq->start);
		if (ac_irq && ac_wakeup_enabled)
			disable_irq_wake(ac_irq->start);
	}

	if (pdata->resume)
		return pdata->resume();

	return 0;
}
#else
#define pda_power_suspend NULL
#define pda_power_resume NULL
#endif /* CONFIG_PM */

static struct platform_driver pda_power_pdrv = {
	.driver = {
		.name = "pda-power",
	},
	.probe = pda_power_probe,
	.remove = pda_power_remove,
	.suspend = pda_power_suspend,
	.resume = pda_power_resume,
};

module_platform_driver(pda_power_pdrv);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");
MODULE_ALIAS("platform:pda-power");
Commit	Line	Data
b2998049 AV	1	/*
	2	* Common power driver for PDAs and phones with one or two external
	3	* power supplies (AC/USB) connected to main and backup batteries,
	4	* and optional builtin charger.
	5	*
	6	* Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/platform_device.h>
5bf2b994	15	#include <linux/err.h>
b2998049	16	#include <linux/interrupt.h>
9ad63986	17	#include <linux/notifier.h>
b2998049 AV	18	#include <linux/power_supply.h>
b2998049 AV	19	#include <linux/pda_power.h>
5bf2b994	20	#include <linux/regulator/consumer.h>
b2998049 AV	21	#include <linux/timer.h>
b2998049 AV	22	#include <linux/jiffies.h>
5bf2b994	23	#include <linux/usb/otg.h>
b2998049 AV	24
	25	static inline unsigned int get_irq_flags(struct resource *res)
	26	{
d554a3f9	27	return IRQF_SHARED \| (res->flags & IRQF_TRIGGER_MASK);
b2998049 AV	28	}
	29
	30	static struct device *dev;
	31	static struct pda_power_pdata *pdata;
	32	static struct resource ac_irq, usb_irq;
	33	static struct timer_list charger_timer;
	34	static struct timer_list supply_timer;
c3caebad AV	35	static struct timer_list polling_timer;
c3caebad AV	36	static int polling;
b2998049	37
820d0883	38	#if IS_ENABLED(CONFIG_USB_PHY)
86753811	39	static struct usb_phy *transceiver;
9ad63986	40	static struct notifier_block otg_nb;
1c74529d AL	41	#endif
1c74529d AL	42
5bf2b994 PZ	43	static struct regulator *ac_draw;
5bf2b994 PZ	44
bfde2662 AV	45	enum {
	46	PDA_PSY_OFFLINE = 0,
	47	PDA_PSY_ONLINE = 1,
	48	PDA_PSY_TO_CHANGE,
	49	};
	50	static int new_ac_status = -1;
	51	static int new_usb_status = -1;
	52	static int ac_status = -1;
	53	static int usb_status = -1;
	54
b2998049 AV	55	static int pda_power_get_property(struct power_supply *psy,
	56	enum power_supply_property psp,
	57	union power_supply_propval *val)
	58	{
	59	switch (psp) {
	60	case POWER_SUPPLY_PROP_ONLINE:
	61	if (psy->type == POWER_SUPPLY_TYPE_MAINS)
	62	val->intval = pdata->is_ac_online ?
	63	pdata->is_ac_online() : 0;
	64	else
	65	val->intval = pdata->is_usb_online ?
	66	pdata->is_usb_online() : 0;
	67	break;
	68	default:
	69	return -EINVAL;
	70	}
	71	return 0;
	72	}
	73
	74	static enum power_supply_property pda_power_props[] = {
	75	POWER_SUPPLY_PROP_ONLINE,
	76	};
	77
	78	static char *pda_power_supplied_to[] = {
	79	"main-battery",
	80	"backup-battery",
	81	};
	82
bfde2662 AV	83	static struct power_supply pda_psy_ac = {
	84	.name = "ac",
	85	.type = POWER_SUPPLY_TYPE_MAINS,
	86	.supplied_to = pda_power_supplied_to,
	87	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
	88	.properties = pda_power_props,
	89	.num_properties = ARRAY_SIZE(pda_power_props),
	90	.get_property = pda_power_get_property,
b2998049 AV	91	};
b2998049 AV	92
bfde2662 AV	93	static struct power_supply pda_psy_usb = {
	94	.name = "usb",
	95	.type = POWER_SUPPLY_TYPE_USB,
	96	.supplied_to = pda_power_supplied_to,
	97	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
	98	.properties = pda_power_props,
	99	.num_properties = ARRAY_SIZE(pda_power_props),
	100	.get_property = pda_power_get_property,
	101	};
	102
	103	static void update_status(void)
	104	{
	105	if (pdata->is_ac_online)
	106	new_ac_status = !!pdata->is_ac_online();
	107
	108	if (pdata->is_usb_online)
	109	new_usb_status = !!pdata->is_usb_online();
	110	}
	111
b2998049 AV	112	static void update_charger(void)
b2998049 AV	113	{
5bf2b994 PZ	114	static int regulator_enabled;
	115	int max_uA = pdata->ac_max_uA;
	116
	117	if (pdata->set_charge) {
	118	if (new_ac_status > 0) {
	119	dev_dbg(dev, "charger on (AC)\n");
	120	pdata->set_charge(PDA_POWER_CHARGE_AC);
	121	} else if (new_usb_status > 0) {
	122	dev_dbg(dev, "charger on (USB)\n");
	123	pdata->set_charge(PDA_POWER_CHARGE_USB);
	124	} else {
	125	dev_dbg(dev, "charger off\n");
	126	pdata->set_charge(0);
	127	}
	128	} else if (ac_draw) {
	129	if (new_ac_status > 0) {
	130	regulator_set_current_limit(ac_draw, max_uA, max_uA);
	131	if (!regulator_enabled) {
	132	dev_dbg(dev, "charger on (AC)\n");
92311c3c	133	WARN_ON(regulator_enable(ac_draw));
5bf2b994 PZ	134	regulator_enabled = 1;
	135	}
	136	} else {
	137	if (regulator_enabled) {
	138	dev_dbg(dev, "charger off\n");
92311c3c	139	WARN_ON(regulator_disable(ac_draw));
5bf2b994 PZ	140	regulator_enabled = 0;
	141	}
	142	}
b2998049	143	}
b2998049 AV	144	}
b2998049 AV	145
bfde2662	146	static void supply_timer_func(unsigned long unused)
b2998049	147	{
bfde2662 AV	148	if (ac_status == PDA_PSY_TO_CHANGE) {
	149	ac_status = new_ac_status;
	150	power_supply_changed(&pda_psy_ac);
	151	}
5ebf6e6a	152
bfde2662 AV	153	if (usb_status == PDA_PSY_TO_CHANGE) {
	154	usb_status = new_usb_status;
	155	power_supply_changed(&pda_psy_usb);
	156	}
b2998049 AV	157	}
b2998049 AV	158
bfde2662	159	static void psy_changed(void)
b2998049 AV	160	{
	161	update_charger();
	162
bfde2662 AV	163	/*
	164	* Okay, charger set. Now wait a bit before notifying supplicants,
	165	* charge power should stabilize.
	166	*/
b2998049 AV	167	mod_timer(&supply_timer,
b2998049 AV	168	jiffies + msecs_to_jiffies(pdata->wait_for_charger));
b2998049 AV	169	}
b2998049 AV	170
bfde2662 AV	171	static void charger_timer_func(unsigned long unused)
	172	{
	173	update_status();
	174	psy_changed();
	175	}
	176
5ebf6e6a	177	static irqreturn_t power_changed_isr(int irq, void *power_supply)
b2998049	178	{
bfde2662 AV	179	if (power_supply == &pda_psy_ac)
	180	ac_status = PDA_PSY_TO_CHANGE;
	181	else if (power_supply == &pda_psy_usb)
	182	usb_status = PDA_PSY_TO_CHANGE;
	183	else
	184	return IRQ_NONE;
	185
	186	/*
	187	* Wait a bit before reading ac/usb line status and setting charger,
	188	* because ac/usb status readings may lag from irq.
	189	*/
b2998049 AV	190	mod_timer(&charger_timer,
b2998049 AV	191	jiffies + msecs_to_jiffies(pdata->wait_for_status));
bfde2662	192
b2998049 AV	193	return IRQ_HANDLED;
	194	}
	195
c3caebad AV	196	static void polling_timer_func(unsigned long unused)
	197	{
	198	int changed = 0;
	199
	200	dev_dbg(dev, "polling...\n");
	201
	202	update_status();
	203
	204	if (!ac_irq && new_ac_status != ac_status) {
	205	ac_status = PDA_PSY_TO_CHANGE;
	206	changed = 1;
	207	}
	208
	209	if (!usb_irq && new_usb_status != usb_status) {
	210	usb_status = PDA_PSY_TO_CHANGE;
	211	changed = 1;
	212	}
	213
	214	if (changed)
	215	psy_changed();
	216
	217	mod_timer(&polling_timer,
	218	jiffies + msecs_to_jiffies(pdata->polling_interval));
	219	}
	220
820d0883	221	#if IS_ENABLED(CONFIG_USB_PHY)
5bf2b994 PZ	222	static int otg_is_usb_online(void)
5bf2b994 PZ	223	{
9ad63986 DZ	224	return (transceiver->last_event == USB_EVENT_VBUS \|\|
	225	transceiver->last_event == USB_EVENT_ENUMERATED);
	226	}
	227
	228	static int otg_is_ac_online(void)
	229	{
	230	return (transceiver->last_event == USB_EVENT_CHARGER);
	231	}
	232
	233	static int otg_handle_notification(struct notifier_block *nb,
	234	unsigned long event, void *unused)
	235	{
	236	switch (event) {
	237	case USB_EVENT_CHARGER:
	238	ac_status = PDA_PSY_TO_CHANGE;
	239	break;
	240	case USB_EVENT_VBUS:
	241	case USB_EVENT_ENUMERATED:
	242	usb_status = PDA_PSY_TO_CHANGE;
	243	break;
	244	case USB_EVENT_NONE:
	245	ac_status = PDA_PSY_TO_CHANGE;
	246	usb_status = PDA_PSY_TO_CHANGE;
	247	break;
	248	default:
	249	return NOTIFY_OK;
	250	}
	251
	252	/*
	253	* Wait a bit before reading ac/usb line status and setting charger,
	254	* because ac/usb status readings may lag from irq.
	255	*/
	256	mod_timer(&charger_timer,
	257	jiffies + msecs_to_jiffies(pdata->wait_for_status));
	258
	259	return NOTIFY_OK;
5bf2b994 PZ	260	}
	261	#endif
	262
b2998049 AV	263	static int pda_power_probe(struct platform_device *pdev)
	264	{
	265	int ret = 0;
	266
	267	dev = &pdev->dev;
	268
	269	if (pdev->id != -1) {
	270	dev_err(dev, "it's meaningless to register several "
	271	"pda_powers; use id = -1\n");
	272	ret = -EINVAL;
	273	goto wrongid;
	274	}
	275
	276	pdata = pdev->dev.platform_data;
	277
f6b6b180 PZ	278	if (pdata->init) {
	279	ret = pdata->init(dev);
	280	if (ret < 0)
	281	goto init_failed;
	282	}
	283
ec60ea5c PP	284	ac_draw = regulator_get(dev, "ac_draw");
	285	if (IS_ERR(ac_draw)) {
	286	dev_dbg(dev, "couldn't get ac_draw regulator\n");
	287	ac_draw = NULL;
ec60ea5c PP	288	}
ec60ea5c PP	289
bfde2662	290	update_status();
b2998049 AV	291	update_charger();
	292
	293	if (!pdata->wait_for_status)
	294	pdata->wait_for_status = 500;
	295
	296	if (!pdata->wait_for_charger)
	297	pdata->wait_for_charger = 500;
	298
c3caebad AV	299	if (!pdata->polling_interval)
	300	pdata->polling_interval = 2000;
	301
5bf2b994 PZ	302	if (!pdata->ac_max_uA)
	303	pdata->ac_max_uA = 500000;
	304
b2998049 AV	305	setup_timer(&charger_timer, charger_timer_func, 0);
	306	setup_timer(&supply_timer, supply_timer_func, 0);
	307
	308	ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");
	309	usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");
b2998049 AV	310
b2998049 AV	311	if (pdata->supplied_to) {
bfde2662 AV	312	pda_psy_ac.supplied_to = pdata->supplied_to;
	313	pda_psy_ac.num_supplicants = pdata->num_supplicants;
	314	pda_psy_usb.supplied_to = pdata->supplied_to;
	315	pda_psy_usb.num_supplicants = pdata->num_supplicants;
b2998049 AV	316	}
b2998049 AV	317
820d0883	318	#if IS_ENABLED(CONFIG_USB_PHY)
662dca54	319	transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
ded017ee KVA	320	if (!IS_ERR_OR_NULL(transceiver)) {
	321	if (!pdata->is_usb_online)
	322	pdata->is_usb_online = otg_is_usb_online;
	323	if (!pdata->is_ac_online)
	324	pdata->is_ac_online = otg_is_ac_online;
9ad63986	325	}
1c74529d	326	#endif
9ad63986	327
9ef45106	328	if (pdata->is_ac_online) {
bfde2662	329	ret = power_supply_register(&pdev->dev, &pda_psy_ac);
9ef45106 DB	330	if (ret) {
9ef45106 DB	331	dev_err(dev, "failed to register %s power supply\n",
bfde2662	332	pda_psy_ac.name);
9ef45106 DB	333	goto ac_supply_failed;
9ef45106 DB	334	}
b2998049	335
9ef45106 DB	336	if (ac_irq) {
	337	ret = request_irq(ac_irq->start, power_changed_isr,
	338	get_irq_flags(ac_irq), ac_irq->name,
bfde2662	339	&pda_psy_ac);
9ef45106 DB	340	if (ret) {
	341	dev_err(dev, "request ac irq failed\n");
	342	goto ac_irq_failed;
	343	}
c3caebad AV	344	} else {
c3caebad AV	345	polling = 1;
9ef45106	346	}
b2998049 AV	347	}
b2998049 AV	348
9ef45106	349	if (pdata->is_usb_online) {
bfde2662	350	ret = power_supply_register(&pdev->dev, &pda_psy_usb);
b2998049	351	if (ret) {
9ef45106	352	dev_err(dev, "failed to register %s power supply\n",
bfde2662	353	pda_psy_usb.name);
9ef45106	354	goto usb_supply_failed;
b2998049	355	}
b2998049	356
9ef45106 DB	357	if (usb_irq) {
	358	ret = request_irq(usb_irq->start, power_changed_isr,
	359	get_irq_flags(usb_irq),
bfde2662	360	usb_irq->name, &pda_psy_usb);
9ef45106 DB	361	if (ret) {
	362	dev_err(dev, "request usb irq failed\n");
	363	goto usb_irq_failed;
	364	}
c3caebad AV	365	} else {
c3caebad AV	366	polling = 1;
b2998049 AV	367	}
	368	}
	369
820d0883	370	#if IS_ENABLED(CONFIG_USB_PHY)
ded017ee	371	if (!IS_ERR_OR_NULL(transceiver) && pdata->use_otg_notifier) {
9ad63986	372	otg_nb.notifier_call = otg_handle_notification;
fcc8ebc9	373	ret = usb_register_notifier(transceiver, &otg_nb);
9ad63986 DZ	374	if (ret) {
	375	dev_err(dev, "failure to register otg notifier\n");
	376	goto otg_reg_notifier_failed;
	377	}
	378	polling = 0;
	379	}
1c74529d	380	#endif
9ad63986	381
c3caebad AV	382	if (polling) {
	383	dev_dbg(dev, "will poll for status\n");
	384	setup_timer(&polling_timer, polling_timer_func, 0);
	385	mod_timer(&polling_timer,
	386	jiffies + msecs_to_jiffies(pdata->polling_interval));
	387	}
	388
	389	if (ac_irq \|\| usb_irq)
	390	device_init_wakeup(&pdev->dev, 1);
8f8e9b38	391
9ef45106	392	return 0;
b2998049	393
820d0883	394	#if IS_ENABLED(CONFIG_USB_PHY)
9ad63986 DZ	395	otg_reg_notifier_failed:
	396	if (pdata->is_usb_online && usb_irq)
	397	free_irq(usb_irq->start, &pda_psy_usb);
1c74529d	398	#endif
b2998049	399	usb_irq_failed:
9ef45106	400	if (pdata->is_usb_online)
bfde2662	401	power_supply_unregister(&pda_psy_usb);
9ef45106 DB	402	usb_supply_failed:
9ef45106 DB	403	if (pdata->is_ac_online && ac_irq)
bfde2662	404	free_irq(ac_irq->start, &pda_psy_ac);
820d0883	405	#if IS_ENABLED(CONFIG_USB_PHY)
ded017ee	406	if (!IS_ERR_OR_NULL(transceiver))
721002ec	407	usb_put_phy(transceiver);
1c74529d	408	#endif
b2998049	409	ac_irq_failed:
9ef45106	410	if (pdata->is_ac_online)
bfde2662	411	power_supply_unregister(&pda_psy_ac);
9ef45106	412	ac_supply_failed:
5bf2b994 PZ	413	if (ac_draw) {
	414	regulator_put(ac_draw);
	415	ac_draw = NULL;
	416	}
f6b6b180 PZ	417	if (pdata->exit)
	418	pdata->exit(dev);
	419	init_failed:
b2998049	420	wrongid:
b2998049 AV	421	return ret;
	422	}
	423
	424	static int pda_power_remove(struct platform_device *pdev)
	425	{
9ef45106	426	if (pdata->is_usb_online && usb_irq)
bfde2662	427	free_irq(usb_irq->start, &pda_psy_usb);
9ef45106	428	if (pdata->is_ac_online && ac_irq)
bfde2662 AV	429	free_irq(ac_irq->start, &pda_psy_ac);
bfde2662 AV	430
c3caebad AV	431	if (polling)
c3caebad AV	432	del_timer_sync(&polling_timer);
b2998049 AV	433	del_timer_sync(&charger_timer);
b2998049 AV	434	del_timer_sync(&supply_timer);
bfde2662	435
9ef45106	436	if (pdata->is_usb_online)
bfde2662	437	power_supply_unregister(&pda_psy_usb);
9ef45106	438	if (pdata->is_ac_online)
bfde2662	439	power_supply_unregister(&pda_psy_ac);
820d0883	440	#if IS_ENABLED(CONFIG_USB_PHY)
ded017ee	441	if (!IS_ERR_OR_NULL(transceiver))
721002ec	442	usb_put_phy(transceiver);
5bf2b994 PZ	443	#endif
	444	if (ac_draw) {
	445	regulator_put(ac_draw);
	446	ac_draw = NULL;
	447	}
f6b6b180 PZ	448	if (pdata->exit)
f6b6b180 PZ	449	pdata->exit(dev);
bfde2662	450
b2998049 AV	451	return 0;
	452	}
	453
8f8e9b38	454	#ifdef CONFIG_PM
e82374fd RJ	455	static int ac_wakeup_enabled;
	456	static int usb_wakeup_enabled;
	457
8f8e9b38 DB	458	static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
8f8e9b38 DB	459	{
a3bcbbee DM	460	if (pdata->suspend) {
	461	int ret = pdata->suspend(state);
	462
	463	if (ret)
	464	return ret;
	465	}
	466
8f8e9b38 DB	467	if (device_may_wakeup(&pdev->dev)) {
8f8e9b38 DB	468	if (ac_irq)
e82374fd	469	ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
8f8e9b38	470	if (usb_irq)
e82374fd	471	usb_wakeup_enabled = !enable_irq_wake(usb_irq->start);
8f8e9b38 DB	472	}
	473
	474	return 0;
	475	}
	476
	477	static int pda_power_resume(struct platform_device *pdev)
	478	{
	479	if (device_may_wakeup(&pdev->dev)) {
e82374fd	480	if (usb_irq && usb_wakeup_enabled)
8f8e9b38	481	disable_irq_wake(usb_irq->start);
e82374fd	482	if (ac_irq && ac_wakeup_enabled)
8f8e9b38 DB	483	disable_irq_wake(ac_irq->start);
	484	}
	485
a3bcbbee DM	486	if (pdata->resume)
	487	return pdata->resume();
	488
8f8e9b38 DB	489	return 0;
	490	}
	491	#else
	492	#define pda_power_suspend NULL
	493	#define pda_power_resume NULL
	494	#endif /* CONFIG_PM */
	495
b2998049 AV	496	static struct platform_driver pda_power_pdrv = {
	497	.driver = {
	498	.name = "pda-power",
	499	},
	500	.probe = pda_power_probe,
	501	.remove = pda_power_remove,
8f8e9b38 DB	502	.suspend = pda_power_suspend,
8f8e9b38 DB	503	.resume = pda_power_resume,
b2998049 AV	504	};
b2998049 AV	505
300bac7f	506	module_platform_driver(pda_power_pdrv);
b2998049	507
b2998049 AV	508	MODULE_LICENSE("GPL");
b2998049 AV	509	MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");
300bac7f	510	MODULE_ALIAS("platform:pda-power");